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      <p>The Db::set_error_model method is gone.  The way to change the C++ API to
return errors rather than throw exceptions is via a flag on the DbEnv or
Db constructor.  For example:</p>
      <pre class="programlisting">int dberr;
DbEnv *dbenv = new DbEnv(DB_CXX_NO_EXCEPTIONS);</pre>
      <p>creates an environment that will never throw exceptions, and method
returns should be checked instead.</p>
      <p>There are a number of smaller changes to the API that bring the C, C++
and Java APIs much closer in terms of functionality and usage.  Please
refer to the pages for upgrading C applications for further details.</p>
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